Blow-out device for steam-boilers.



PATENTED MAR. 17, 1908. D. BREWS. BLOW-OUT DEVICE FOR STEAM BOILERS.

APPLICATION FILED NOV.11. 1907.

[WENIUR OOOOOO ooooooo Armsr. 441/. 5 I 3. W

Dozglaa B/ws. BY WWI 775m.

DOUGLAS BREWS, OF CLEVELAND, OHIO.

BLOW-OUT DEVICE FOR STEAM-BOILERS.

Specification of Lettors Patent.

7 Patented March 17, 1908.

Application filed November 11, 1907. Serial No. 401,676.

To all whom u may concern:

Be it known that I, DOUGLAS BREWS, a citizen of the United States, residing at Cleveland, in the county' ofCuyahoga and State of Ohio, have invented certain new and useful Improvements in Blow-Out De-- vices for Steam-Boilers, and do declare that the'following is.a full, clear, and exact de- ;,scription of the invention, which will enable mothers skilled in the art to which it appertains to make and use the same.

My inventlon relates to blow-out devices for steam boilers, and the 1nvent1on cons sts in adevice adapted to bemoved up and 5 down at the front of a boiler so as to reach the fines therein successively and to cleanse I my invention, and'Fig. 2 is a vertical sec tional elevation of the front portion of the said boiler and its e uipments.

The device as' t us shown comprises a i boiler, B, say for marine purposes, though not necessarily limited to such purpose or use, and which is provided with three several sets or series of tubes indicated for convenience of reference by 2, 3 and 4, respectively,

and running in parallel rows vertically and transversely. The central or middle series, 2,,extend down below the two side series of tubes in this instance relatively as shown, and the said two side series 3 and 4 correspond with each other in location and arrangement. The said tubes severally .are of the usual boiler kind and have nb novelty in themselves, and C represents a breeching or walled inclosure arranged at the front of the boiler and provided with tubes 5 through which the products of combustion pass from the furnace. Said tubes 5 extend through the air heating chamber 0, which is closed off from the exhaust by diaphragms or plates 7 and 8 supportingsaid draft tubes 5.

Each series of boiler flues, 2, 3 and 4, re-

' spectively, is provided with its own blow-out or cleansing device, and these are alike. Thusl, the (ilevice in'each (18.585138 a steam 'su y an su ortin tu e ro'ecting thilihgh said brgdbhin 0 from the liop downward and having a earin 'in bracket 9 thereon and in one of the sai exhaust tubes 5 through which it extends into the spacebeneath the same, more or less as the service demanda'said-f ipe D bein slidable or adjustable up an down in t ese bearings to reach the boiler fiues at all elevations.

A tubular cross head G is fixed at its mid-. dle to each pipe-D and carriesinjector nipples'd corresponding to the rows of boiler tubes, thus reaching all said tubes in each section as the cross head for each is moved over the same u wards or downwards or both, and-stopped for the time opposite said tubes. Now, this leads up to the vital and material difi'erence herein over other inventions in this art familiar to me, and di'fl'ferentiates the same from other constructions in this, that I provide a set of stay bars, rods or braces E for each cross-head behind the same, and which rods or braces are fixed inan'u right position within casing C opposite the flue area of the boiler and at least equal in length to the movement of the cross-heads in' front ofsaid flues. These braces are material and important for two reasons, viz., to overcome the back pressure by the steam as it is blown out through nipples d in the crosshead and to keep the cross head from turning or rotating more from working position at either end in or through pipe D, said pipe really'being free to turn within limits in its 5 bearings and having no other means for kee ing it and the cross-head square with t e boiler tubes but these back' braces or guides. It will be seen that said braces arearra'nged behind the respective ends of the crossheads,- thus preventing possible turning on the axis of pipe I), and that they form a backing along which the cross-,heads slide but are otherwise independent thereof.

The eneral steani'su'pply pipe H has the several istributin pipes D connected therewith by sections and elbow or equivalent joints J here and there, which permits said' pipes or connections to flex or bend more or ess according to the positions of pipes D, and as clearly disclosed in the two positions of corresponding pipes in Fig. 2, the straight connection showing position when the crosshead is down, say as'at middle section oftubes, Fig. 1, and the flexed or bent position as when the cross-head is raised, seen at the :leftin Fig. 1. Handles L serve to operate the parts by hand, but this mig I ht be done by power connections. Experience shows that the said vertical bearing rods E for the cross-heads need to be especially'strong and firm, because in my earlier experiences with them I found some that had been bent by V the back pressure of the steam whic greatly crippled operations. Hence, such ars or rods need to be strong enough to .re-

sist such pressure, say approximately two inches across if round rods be used.

If the draft tubes be not used in a boiler setting any sufficient bearing for pipes D which is the equivalent of tubes 5 may be substituted.

What I claim is: 1. A boiler having a series of flues arranged in parallel rows vertically and horizontally, a steam supply pi e and a crosshead fixed to said pipe at its ihiddle and provided-With a seriesof jets at the front of said flues respectively and fixed upright supports behind theends of said cross-head adapted to back the same against back pressure by the dischar ing steam.

2. A tubular bo' er,-a steam supply pipe having a steam delivering cross-head adapted to be raised and lowered opposite the front of the-tubes of the boiler to different horizontal planes, in combination with fixed vertical braces at the ends of said crosshead in respect to which said head is slidable up and down to different elevations, and

the said braces extending the full depth of the space over which said cross-head is movable.

.3. A steam blow-out device for boiler tubes comprising a vertical and centrally disposed steam supply pipe and a cross-head 'fixed at its middle on the lower end of said DOUGLAS BREWS. Witnesses R. B. MosER, F. C. MUSSUN. 

